If an 837 claim is submitted as a Void (CLM05-3 = 8), should that claim in the production system contain the Patient Control Number (CLM01) of the original claim being voided or the new Void CLM01 value? Or, should the CLM01 value of the Void claim be equal to the original claim being voided CLM01? The TR3's notes on CLM01 recommend a unique identifier.
The CLM01 is used by the submitter as a key in the submitter's system to match the claim to the payment. The two recommended identifiers are either the Patient Account Number or the Claim Number in the billing submitter's patient management system. There is no requirement that the CLM01 values of the original and voided claims either be the same or different. This is dependent upon how the values are managed in the submitter's system. It is up to the submitter to determine how best to use this value to maintain control of the claims in their system.